Though evil is sweet in his mouth,
though he hides it under his tongue,
though he is loath to let it go and holds it in his mouth,
yet his food is turned in his stomach;
it is the venom of cobras within him. —Job 20:12-14
Zophar uses vivid imagery in vv. 12-14 to make his point. His argument is that “a wicked person savors his evil-doing just as a child holds a sweet morsel under the tongue, refusing to swallow it until he squeezes out every bit of flavor” (Hartley, 305).
But eventually it will dissolve, . . . it will turn bitter in his stomach. It may taste good now but one day you’ll need some moral Tums!